<?php if ( has_nav_menu('foot-menu')){ ?>
	<?php wp_nav_menu( array( 'container' => false, 'theme_location' => 'foot-menu' ) ); ?>
<?php } else { ?>
	<span><a target="_blank" href="<?php bloginfo('url'); ?>/wp-admin/nav-menus.php">请点此跳转到后台外观-菜单处设置您的页脚自定义菜单</a></span>
<?php } ?>